const mg = require("mongoose");

mg.connect("mongodb://localhost:27017/sh2203");

mg.connection.on("connected", ()=>{
    console.log("数据库连接成功")
})
mg.connection.on("disconnected", ()=>{
    console.log("数据库连接断开")
})
mg.connection.on("error", ()=>{
    console.log("数据库连接失败")
})

module.exports = mg;